DE1902270B2 - Verfahren zur Herstellung eines im wesentlichen aus Eisen bestehenden magnetisch stabilen Pulvers für magnetische Aufzeichnung - Google Patents

Verfahren zur Herstellung eines im wesentlichen aus Eisen bestehenden magnetisch stabilen Pulvers für magnetische Aufzeichnung

Info

Publication number
DE1902270B2
DE1902270B2 DE1902270A DE1902270A DE1902270B2 DE 1902270 B2 DE1902270 B2 DE 1902270B2 DE 1902270 A DE1902270 A DE 1902270A DE 1902270 A DE1902270 A DE 1902270A DE 1902270 B2 DE1902270 B2 DE 1902270B2
Authority
DE
Germany
Prior art keywords
iron
powder
magnetic
solution
liquid
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
DE1902270A
Other languages
German (de)
English (en)
Other versions
DE1902270A1 (de
Inventor
Cornelis Johannes Klomp
Gerard Willem Van Oosterhout
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Koninklijke Philips NV
Original Assignee
Philips Gloeilampenfabrieken NV
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Philips Gloeilampenfabrieken NV filed Critical Philips Gloeilampenfabrieken NV
Publication of DE1902270A1 publication Critical patent/DE1902270A1/de
Publication of DE1902270B2 publication Critical patent/DE1902270B2/de
Ceased legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F1/00—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties
    • H01F1/01—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials
    • H01F1/03—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity
    • H01F1/032—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials
    • H01F1/04—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials metals or alloys
    • H01F1/06—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials metals or alloys in the form of particles, e.g. powder
    • H01F1/065—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials metals or alloys in the form of particles, e.g. powder obtained by a reduction
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
    • G11B5/62—Record carriers characterised by the selection of the material
    • G11B5/68—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent
    • G11B5/70—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent on a base layer
    • G11B5/706—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent on a base layer characterised by the composition of the magnetic material
    • G11B5/70605—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent on a base layer characterised by the composition of the magnetic material metals or alloys
    • G11B5/70615—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent on a base layer characterised by the composition of the magnetic material metals or alloys containing Fe metal or alloys
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
    • G11B5/62—Record carriers characterised by the selection of the material
    • G11B5/68—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent
    • G11B5/70—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent on a base layer
    • G11B5/706—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent on a base layer characterised by the composition of the magnetic material
    • G11B5/70626—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent on a base layer characterised by the composition of the magnetic material containing non-metallic substances
    • G11B5/70642—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent on a base layer characterised by the composition of the magnetic material containing non-metallic substances iron oxides
    • G11B5/70652—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent on a base layer characterised by the composition of the magnetic material containing non-metallic substances iron oxides gamma - Fe2 O3
    • G11B5/70668—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent on a base layer characterised by the composition of the magnetic material containing non-metallic substances iron oxides gamma - Fe2 O3 containing a dopant

Landscapes

  • Engineering & Computer Science (AREA)
  • Metallurgy (AREA)
  • Power Engineering (AREA)
  • Hard Magnetic Materials (AREA)
  • Manufacture Of Metal Powder And Suspensions Thereof (AREA)
  • Paints Or Removers (AREA)
DE1902270A 1968-01-31 1969-01-17 Verfahren zur Herstellung eines im wesentlichen aus Eisen bestehenden magnetisch stabilen Pulvers für magnetische Aufzeichnung Ceased DE1902270B2 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL6801383.A NL160106C (nl) 1968-01-31 1968-01-31 Werkwijze ter bereiding van een in hoofdzaak uit ijzer bestaand magnetisch stabiel poeder, voor magnetische registratie.

Publications (2)

Publication Number Publication Date
DE1902270A1 DE1902270A1 (de) 1969-09-04
DE1902270B2 true DE1902270B2 (de) 1975-04-30

Family

ID=19802639

Family Applications (1)

Application Number Title Priority Date Filing Date
DE1902270A Ceased DE1902270B2 (de) 1968-01-31 1969-01-17 Verfahren zur Herstellung eines im wesentlichen aus Eisen bestehenden magnetisch stabilen Pulvers für magnetische Aufzeichnung

Country Status (9)

Country Link
US (1) US3598568A (nl)
AT (1) AT313337B (nl)
BE (1) BE727606A (nl)
CH (1) CH510118A (nl)
DE (1) DE1902270B2 (nl)
FR (1) FR1602579A (nl)
GB (1) GB1192167A (nl)
NL (1) NL160106C (nl)
SE (1) SE352768B (nl)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2738421A1 (de) * 1976-08-27 1978-03-02 Victor Company Of Japan Magnetisches metallisches pulver und dessen verwendung
DE2646348A1 (de) * 1976-10-14 1978-04-20 Basf Ag Ferromagnetische, im wesentlichen aus eisen bestehende metallteilchen und verfahren zu deren herstellung
DE2756275A1 (de) * 1976-12-20 1978-11-16 Hitachi Maxell Nadelfoermige ferromagnetische metallteilchen und verfahren zu ihrer herstellung
EP0056257A1 (en) * 1981-01-10 1982-07-21 Hitachi Maxell Ltd. Method for production of metal magnetic particles
EP0100669A1 (en) * 1982-07-31 1984-02-15 Toda Kogyo Corp. Acicular ferromagnetic alloy particles for use in magnetic recording media

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3902888A (en) * 1971-08-19 1975-09-02 Fuji Photo Film Co Ltd Process for preparing ferromagnetic alloy powder
DE2212933A1 (de) * 1972-03-17 1973-09-20 Philips Nv Verfahren zur herstellung eines im wesentlichen aus eisen bestehenden metallpulvers
NL167729C (nl) * 1973-05-03 1982-01-18 Philips Nv Werkwijze voor het bereiden van een hoofdzakelijk uit ijzer bestaand metaalpoeder.
DE2361539C2 (de) * 1973-12-11 1984-06-20 Philips Patentverwaltung Gmbh, 2000 Hamburg Verfahren zur Herstellung eines ferromagnetischen, überwiegend aus Eisen bestehenden Materials
IT1026663B (it) * 1974-11-29 1978-10-20 Montedison Spa Procedimento per preparare polve ri metalliche a base di ferro per registrzione hagnetica
US3967986A (en) * 1975-01-27 1976-07-06 U.S. Philips Corporation Method of preparing ferromagnetic material
US4043846A (en) * 1975-03-17 1977-08-23 Hitachi, Ltd. Method of producing ferromagnetic metal powder by gaseous reduction of silicon compound-coated raw material
JPS54122664A (en) * 1978-03-16 1979-09-22 Kanto Denka Kogyo Kk Production of magnetic powder for magnetic recording based on iron
JPS54122663A (en) * 1978-03-16 1979-09-22 Kanto Denka Kogyo Kk Production of magnetic powder for magnetic recording based on iron
US4165232A (en) * 1978-09-15 1979-08-21 Basf Aktiengesellschaft Manufacture of ferromagnetic metal particles essentially consisting of iron
DE2909480A1 (de) * 1979-03-10 1980-09-11 Bayer Ag Ferromagnetisches, im wesentlichen aus eisen bestehendes metallpigment und verfahren zu dessen herstellung
DE3167164D1 (en) * 1980-05-30 1984-12-20 Hitachi Maxell Process for preparing ferromagnetic particles comprising metallic iron
US4305753A (en) * 1980-07-31 1981-12-15 Hercules Incorporated Process for producing ferromagnetic metallic particles
JPS5980901A (ja) * 1982-11-01 1984-05-10 Fuji Photo Film Co Ltd 強磁性金属粉末の製造法
US5110658A (en) * 1987-10-19 1992-05-05 Konica Corporation Magnetic recording medium

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2738421A1 (de) * 1976-08-27 1978-03-02 Victor Company Of Japan Magnetisches metallisches pulver und dessen verwendung
DE2646348A1 (de) * 1976-10-14 1978-04-20 Basf Ag Ferromagnetische, im wesentlichen aus eisen bestehende metallteilchen und verfahren zu deren herstellung
DE2756275A1 (de) * 1976-12-20 1978-11-16 Hitachi Maxell Nadelfoermige ferromagnetische metallteilchen und verfahren zu ihrer herstellung
EP0056257A1 (en) * 1981-01-10 1982-07-21 Hitachi Maxell Ltd. Method for production of metal magnetic particles
EP0100669A1 (en) * 1982-07-31 1984-02-15 Toda Kogyo Corp. Acicular ferromagnetic alloy particles for use in magnetic recording media

Also Published As

Publication number Publication date
GB1192167A (en) 1970-05-20
NL160106C (nl) 1979-09-17
US3598568A (en) 1971-08-10
DE1902270A1 (de) 1969-09-04
NL160106B (nl) 1979-04-17
FR1602579A (nl) 1970-12-28
SE352768B (nl) 1973-01-08
BE727606A (nl) 1969-07-29
CH510118A (de) 1971-07-15
NL6801383A (nl) 1969-08-04
AT313337B (de) 1974-02-11

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Legal Events

Date Code Title Description
8235 Patent refused